A rapid annealing device for automatically flattening welding strips

Abstract

The utility model relates to a rapid annealing device for automatically flattening a welding strip, comprising a bracket, a flattening device and a pulling mechanism are arranged on the bracket, and the flattening device is connected to the pulling mechanism through the welding strip; a pre-annealing wheel group, a heat preservation box A, a main annealing wheel group and a heat preservation box B are arranged on the bracket, and the welding strip passes through the flattening device and sequentially passes through the pre-annealing wheel group, the heat preservation box A, the main annealing wheel group and the heat preservation box B to be connected to the pulling mechanism; the utility model performs high-temperature annealing on the flattened welding strip through the pre-annealing wheel group, the heat preservation box A, the main annealing wheel group and the heat preservation box B in sequence, reduces the yield strength of the flattened welding strip, keeps the welding strip relatively soft, reduces the hidden crack rate of the welding strip, and improves the annealing efficiency at the same time, and is simple, efficient, safe and reliable.

Description

Technical Field

[0001] The utility model relates to the technical field of annealing, in particular to a rapid annealing device for automatically flattening a welding strip. Background Art

[0002] The welding ribbon is used to connect two adjacent cells, connecting the cells in series to form a higher voltage. Common shapes of welding ribbons include round welding ribbons, flat welding ribbons, triangular welding ribbons, reflective welding ribbons, segmented welding ribbons, etc. In order to reduce the weight of the film on the back of the module, reducing the size of the back welding ribbon is a feasible solution. There are currently two solutions: one is the finished segmented welding ribbon, and the other is to add a flattening device to the welding machine to flatten the back of the corresponding welding ribbon; the segmented welding ribbon cannot be used in photovoltaic modules of different specifications due to the customized arrangement size. And because the position of the welding ribbon needs to be recalibrated every time the reel is changed, the operation complexity increases, and the customized purchase of welding ribbon may also lead to information leakage of the module manufacturer.

[0003] Adding a flattening device to flatten the back of the welding strip can automatically identify the required flattening position according to the set parameters such as the cell size and cell spacing, so there is no need to purchase special materials separately. It is suitable for cells of different sizes, different types of welding strips, and different welding methods. However, after the welding strip is flattened, the yield strength of the welding strip increases by 20% to 70%, and the elastic modulus increases by 20% to 70%. The welding strip is no longer soft as a whole, and the contact stress at the contact position with the cell is large, which increases the hidden crack rate and reduces the qualified rate. Therefore, when using conventional materials, how to maintain a low hidden crack rate when flattening the back of the welding strip is a problem that needs to be solved. Utility Model Content

[0004] The utility model aims at the deficiencies of the prior art and provides a rapid annealing device for automatically flattening a welding strip, which performs high-temperature annealing on the flattened welding strip in sequence through a pre-annealing wheel group, a heat preservation box A, a main annealing wheel group, and a heat preservation box B, thereby reducing the yield strength of the flattened welding strip, keeping the welding strip relatively soft, reducing the hidden crack rate of the welding strip, and improving the annealing efficiency. The device is simple, efficient, safe, reliable, and easy to operate.

[0005] The utility model is realized by the following technical scheme, and provides a rapid annealing device for automatically flattening a welding strip, comprising a bracket, on which a flattening device and a pulling mechanism are arranged, and the flattening device is connected to the pulling mechanism through the welding strip; a pre-annealing wheel group, a heat preservation box A, a main annealing wheel group and a heat preservation box B are arranged on the bracket, and the welding strip passes through the flattening device and sequentially passes through the pre-annealing wheel group, the heat preservation box A, the main annealing wheel group and the heat preservation box B to be connected to the pulling mechanism; the flattened welding strip is annealed at high temperature sequentially through the pre-annealing wheel group, the heat preservation box A, the main annealing wheel group and the heat preservation box B, so as to reduce the yield strength of the flattened welding strip, so that the welding strip remains relatively soft, the hidden crack rate of the welding strip is reduced, and the annealing efficiency is improved at the same time.

[0006] As an optimization, the pre-annealing wheel group includes an annealing wheel A and an annealing wheel B, and the main annealing wheel group includes an annealing wheel C and an annealing wheel D; a welding strip transmission channel is formed between the annealing wheel A and the annealing wheel B, and between the annealing wheel C and the annealing wheel D, and the annealing wheel A, the annealing wheel B, the annealing wheel C and the annealing wheel D are all arranged in contact with the welding strip; the annealing treatment is performed on both sides of the welding strip at the same time by the annealing wheel A and the annealing wheel B, the annealing wheel C and the annealing wheel D, so as to increase the annealing efficiency of the welding strip and avoid an increase in the hidden crack rate of the welding strip due to the temperature difference on both sides of the welding strip.

[0007] As an optimization, annealing wheel A and annealing wheel C are both located on the side where the welding strip steering angle is less than or equal to 180°, and the bracket is provided with a clamping mechanism A for driving annealing wheel B to move toward annealing wheel A, and a clamping mechanism B for driving annealing wheel D to move toward annealing wheel C; the spacing between annealing wheel A and annealing wheel B is changed by clamping mechanism A, and the spacing between annealing wheel C and annealing wheel D is changed by clamping mechanism B, so as to ensure that the pre-annealing wheel group and the main annealing wheel group can anneal welding strips of different styles.

[0008] As an optimization, a step temperature control device is provided in the insulation box A, and the welding strip passes through the step temperature control device; the welding strip is gradually annealed by the step temperature control device provided in the insulation box A to avoid an increase in the hidden crack rate of the welding strip due to rapid annealing.

[0009] As an optimization, a constant temperature device is provided in the insulation box B, and the welding strip passes through the constant temperature device; the welding strip is insulated by the constant temperature device provided in the insulation box B, so that the welding strip remains soft.

[0010] The beneficial effects of the utility model are as follows: the flattened welding strip is subjected to high-temperature annealing in sequence by the pre-annealing wheel group, the heat preservation box A, the main annealing wheel group, and the heat preservation box B, so that the yield strength of the flattened welding strip is reduced, the welding strip is kept relatively soft, the hidden crack rate of the welding strip is reduced, and the annealing efficiency is improved at the same time; the two sides of the welding strip are subjected to annealing treatment by the annealing wheel A and the annealing wheel B, the annealing wheel C and the annealing wheel D at the same time, so that the annealing efficiency of the welding strip is increased, and the hidden crack rate of the welding strip is avoided to increase due to the temperature difference on the two sides of the welding strip; the spacing between the annealing wheel A and the annealing wheel B is changed by the clamping mechanism A, and the spacing between the annealing wheel C and the annealing wheel D is changed by the clamping mechanism B, so as to ensure that the pre-annealing wheel group and the main annealing wheel group anneal welding strips of different styles; the welding strip is gradually annealed by the step temperature control device provided in the heat preservation box A, so as to avoid the increase of the hidden crack rate of the welding strip caused by rapid annealing; the welding strip is kept warm by the constant temperature device provided in the heat preservation box B, so that the welding strip remains soft. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the structure of the utility model;

[0012] As shown in the figure:

[0013] 1. Flattening device, 2. Pulling mechanism, 3. Pre-annealing wheel group, 4. Insulation box A, 5. Main annealing wheel group, 6. Insulation box B, 7. Steering wheel, 8. Welding strip, 9. Bracket, 31. Annealing wheel A, 32. Annealing wheel B, 33. Clamping mechanism A, 41. Step temperature control device, 51. Annealing wheel C, 52. Annealing wheel D, 53. Clamping mechanism B, 61. Constant temperature device, 331. Guide rod A, 332. Conduit A, 333. Spring A, 531. Guide rod B, 532. Conduit B, 533. Spring B. DETAILED DESCRIPTION

[0014] In order to clearly illustrate the technical features of this solution, this solution is described below through a specific implementation method.

[0015] like Figure 1 The utility model of the automatic flattening welding strip rapid annealing device shown in the figure comprises a bracket 9, on which a flattening device 1 and a pulling mechanism 2 are arranged, and the flattening device 1 is connected to the pulling mechanism 2 through the welding strip 8; the bracket 9 is provided with a pre-annealing wheel group 3, a heat preservation box A4, a main annealing wheel group 5 and a heat preservation box B6, and the welding strip 8 passes through the flattening device 1 and sequentially passes through the pre-annealing wheel group 3, the heat preservation box A4, the main annealing wheel group 5 and the heat preservation box B6 to connect to the pulling mechanism 2; between the heat preservation box B6 and the pulling mechanism 2 A steering wheel 7 is provided, and the welding strip 8 passes through the insulation box B6, the steering wheel 7 and the pulling mechanism 2 in sequence. The steering wheel 7 is used to fix the transmission direction of the welding strip 8; the pre-annealing wheel group 3, the insulation box A4, the main annealing wheel group 5 and the insulation box B6 are all connected to the annealing power supply; the pre-annealing wheel group 3 is heated to 80-130°C by the annealing power supply; the main annealing wheel group 5 is heated to 150°C-200°C by the annealing power supply; at the same time, the pre-annealing wheel group 3 and the main annealing wheel group 5 are used to fix the transmission direction of the welding strip 8.

[0016] The pulling mechanism 2 is started, and the pulling mechanism 2 drives the welding strip 8 to be transmitted on the flattening device 1, the pre-annealing wheel group 3, the insulation box A4, the main annealing wheel group 5, the insulation box B6 and the steering wheel 7 in sequence; the flattening device 1 is started, and the flattening device 1 flattens the corresponding part of the welding strip 8 according to the production demand; the welding strip 8 passes through the pre-annealing wheel group 3, and the pre-annealing wheel group 3 pre-anneals the welding strip 8, and the welding strip 8 is heated to 80-130°C; the welding strip 8 passes through the insulation box A4, and the insulation box A4 anneals the welding strip 8; the welding strip 8 passes through the main annealing wheel group 5, and the main annealing wheel group 5 anneals the welding strip 8, and the welding strip 8 is heated to 150-200°C; the welding strip 8 passes through the insulation box B6, and the insulation box B6 anneals the welding strip 8.

[0017] like Figure 1The pre-annealing wheel group 3 shown includes an annealing wheel A31 and an annealing wheel B32, and the main annealing wheel group 5 includes an annealing wheel C51 and an annealing wheel D52; a welding strip 8 transmission channel is formed between the annealing wheel A31 and the annealing wheel B32, and between the annealing wheel C51 and the annealing wheel D52, and the annealing wheel A31, the annealing wheel B32, the annealing wheel C51 and the annealing wheel D52 are all arranged in contact with the welding strip 8; the welding strip 8 is transmitted between the annealing wheel A31 and the annealing wheel B32, and between the annealing wheel C51 and the annealing wheel D52, and the annealing wheel A31, the annealing wheel B32, the annealing wheel C51 and the annealing wheel D52 pre-anneal the welding strip 8 at the same time.

[0018] like Figure 1 The annealing wheel A31 and the annealing wheel C51 are both located on the side where the steering angle of the welding strip 8 is less than or equal to 180°, and the bracket 9 is provided with a clamping mechanism A33 for driving the annealing wheel B32 to move toward the annealing wheel A31 and a clamping mechanism B53 for driving the annealing wheel D52 to move toward the annealing wheel C51; the clamping mechanism A33 includes a conduit A332 extending toward the annealing wheel A31, and the conduit A332 is fixed on the bracket 9; a guide rod A331 is slidably penetrated in the conduit A332, and the annealing wheel B32 is rotated on the guide rod A331; the end of the guide rod A331 away from the annealing wheel B32 passes through the spring A333 and is connected to the conduit A332; the clamping mechanism B 53 includes a conduit B532 extending toward the annealing wheel C51, and the conduit B532 is fixed on the bracket 9; a guide rod B531 is slidably penetrated in the conduit B532, and the annealing wheel D52 is rotatably arranged on the guide rod B531; the end of the guide rod B531 away from the annealing wheel D52 passes through the spring B533 and is connected with the conduit B532; the welding strip 8 is transmitted between the annealing wheel A31 and the annealing wheel B32, and between the annealing wheel C51 and the annealing wheel D52, and the clamping mechanism A33 drives the annealing wheel B32 away from or close to the annealing wheel A31 according to the structure of the assembled welding strip 8, and the clamping mechanism B53 drives the annealing wheel D52 away from or close to the annealing wheel C51 according to the structure of the assembled welding strip 8.

[0019] like Figure 1 The insulation box A4 is provided with a step temperature control device 41, and the welding strip 8 passes through the step temperature control device 41; the temperature in the insulation box A4 is gradually increased from 80 to 130 degrees Celsius to 100 to 150 degrees Celsius along the direction from the pre-annealing wheel group 3 to the main annealing wheel group 5; the welding strip 8 passes through the insulation box A4, the step temperature control device 41 is started, and the temperature of the welding strip 8 is gradually increased from 80 to 130 degrees Celsius to 100 to 150 degrees Celsius as it moves in the insulation box A4.

[0020] like Figure 1 The insulation box B6 shown is provided with a constant temperature device 61, and the welding strip 8 passes through the constant temperature device 61; the temperature in the insulation box B6 is set to 150-200°C; when the welding strip 8 passes through the insulation box B6, the constant temperature device 61 is started, and the constant temperature device 61 maintains the temperature of the welding strip 8 at 150-200°C.

[0021] In the actual production process, the pulling mechanism 2 is started, and the pulling mechanism 2 drives the welding strip 8 to be transmitted on the flattening device 1, the pre-annealing wheel group 3, the insulation box A4, the main annealing wheel group 5, the insulation box B6 and the steering wheel 7 in sequence; the flattening device 1 is started, and the flattening device 1 flattens the corresponding part of the welding strip 8 according to the production requirements; the welding strip 8 passes through the pre-annealing wheel group 3, and the welding strip 8 is transmitted between the annealing wheel A31 and the annealing wheel B32. The clamping mechanism A33 drives the annealing wheel B32 away from or close to the annealing wheel A31 according to the structure of the welding strip 8, and the welding strip 8 is pre-annealed on the annealing wheel A31 and the annealing wheel B32 at the same time, and the welding strip 8 is pre-annealed on the annealing wheel A31 and the annealing wheel B32. The temperature of the strip 8 is increased to 80-130°C; the strip 8 passes through the heat preservation box A4, and the step temperature control device 41 is started. As the strip 8 moves in the heat preservation box A4, the temperature of the strip 8 gradually increases from 80-130°C to 100-150°C; the strip 8 passes through the main annealing wheel group 5, and the strip 8 is transmitted between the annealing wheel C51 and the annealing wheel D52. The clamping mechanism B53 drives the annealing wheel D52 away from or close to the annealing wheel C51 according to the structure of the strip 8, and the strip 8 is heated to 150-200°C; the strip 8 passes through the heat preservation box B6, and the constant temperature device 61 is started. The constant temperature device 61 maintains the temperature of the strip 8 at 150-200°C.

[0022] Of course, the above description is not limited to the above examples. The technical features not described in the present invention can be achieved by or by adopting the existing technology, which will not be repeated here. The above embodiments and drawings are only used to illustrate the technical scheme of the present invention and are not limitations of the present invention. The present invention is described in detail with reference to the preferred implementation methods. Ordinary technicians in this field should understand that the changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention do not deviate from the purpose of the present invention and should also fall within the scope of protection of the claims of the present invention.

Claims

1. A rapid annealing device for automatically flattening a welding strip, comprising a bracket (9), a flattening device (1) and a pulling mechanism (2) being provided on the bracket (9), the flattening device (1) being connected to the pulling mechanism (2) via a welding strip (8); characterized in that: A pre-annealing wheel set (3), a heat preservation box A (4), a main annealing wheel set (5) and a heat preservation box B (6) are arranged on the bracket (9); the welding strip (8) passes through the flattening device (1) and sequentially passes through the pre-annealing wheel set (3), the heat preservation box A (4), the main annealing wheel set (5) and the heat preservation box B (6) to connect to the pulling mechanism (2).

2. The rapid annealing device for automatically flattening a welding strip according to claim 1 is characterized in that: The pre-annealing wheel group comprises an annealing wheel A (31) and an annealing wheel B (32), and the main annealing wheel group (5) comprises an annealing wheel C (51) and an annealing wheel D (52); a welding strip (8) transmission channel is formed between the annealing wheel A (31) and the annealing wheel B (32), and between the annealing wheel C (51) and the annealing wheel D (52), and the annealing wheel A (31), the annealing wheel B (32), the annealing wheel C (51) and the annealing wheel D (52) are all arranged in contact with the welding strip (8).

3. The rapid annealing device for automatically flattening a welding strip according to claim 2 is characterized in that: The annealing wheel A (31) and the annealing wheel C (51) are located on the side of the welding strip (8) where the turning angle is less than or equal to 180 degrees, and the bracket (9) is provided with a clamping mechanism A (33) for driving the annealing wheel B (32) to move toward the annealing wheel A (31) and a clamping mechanism B (53) for driving the annealing wheel D (52) to move toward the annealing wheel C (51).

4. The rapid annealing device for automatically flattening a welding strip according to claim 1 is characterized in that: A step temperature control device (41) is provided in the heat preservation box A (4), and the welding strip (8) passes through the step temperature control device (41).

5. The rapid annealing device for automatically flattening a welding strip according to claim 1 is characterized in that: A constant temperature device (61) is arranged in the heat preservation box B (6), and the welding strip (8) passes through the constant temperature device (61).

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